the governor didn't even do us the courtesy of telling us what it costs. so you can't make policy based on slogans. i think the fact that this doesn't have any numbers in it means that it was thrown together as a campaign device and it's the mark of its fundamental lack of seriousness. the tax revenues went up in the '80s and '90s because people were getting whacked with social security increases and now you're going to put social security at risk because revenue is going to be socked again. so i think it's a very half-baked plan. >> woodruff: come back to you stephen moore. it's not just rick perry, it's herman cain with the famous 999 plant, it's newt gingrich, governor jon huntsman who are talking about a flat tax. as you look at those proposals, is there one that's better than the others in your mind and how many americans are paying taxes today. what percentage of americans pay taxes? >> great point, first of all, i think newt gingrich said something very wise in the last republican debate when he said "look, at least republicans... they have all thes